Tamil Nadu is working towards becoming self-sufficient in milk production through:

Improving cattle breeds
Expanding fodder cultivation
Modernizing dairy infrastructure
All of the above

The correct answer is: d) All of the above.

Tamil Nadu is working towards becoming self-sufficient in milk production through a number of initiatives, including improving cattle breeds, expanding fodder cultivation, and modernizing dairy infrastructure.

Improving cattle breeds is important because it can lead to increased milk production. By improving the genetic quality of cattle, farmers can produce more milk from each cow. This can be done through selective breeding or by cross-breeding with high-producing breeds.

Expanding fodder cultivation is also important because it can help to ensure that there is enough food for cattle to eat. Fodder is the main source of food for cattle, and if there is not enough of it, then cattle will not be able to produce as much milk. Fodder can be grown on land that is not suitable for other crops, and it can also be imported from other countries.

Modernizing dairy infrastructure is also important because it can help to improve the efficiency of milk production. Modern dairy farms have facilities for milking cows, storing milk, and processing milk into products such as milk powder and cheese. These facilities can help to reduce the cost of milk production and increase the quality of milk products.

By taking these initiatives, Tamil Nadu is working towards becoming self-sufficient in milk production. This will help to ensure that the state has a reliable supply of milk, and it will also help to boost the economy of the state.